<template>
	<!--  -->
  <div class="player" v-show="playlist.length>0">
	<!-- 播放器 -->
   <transition name="normal"
                @enter="enter"
                @after-enter="afterEnter"
                @leave="leave"
                @after-leave="afterLeave"
    >
		
      <div class="normal-player" v-show="fullScreen">
        <div class="background">
          <img width="100%" height="100%" :src="currentSong.image">
        </div>
        <div class="top">
          <div class="back" @click="back">
            <i class="icon-back"></i>
          </div>
          <h1 class="title" v-html="currentSong.name"></h1>
          <h2 class="subtitle" v-html="currentSong.singer"></h2>
        </div>
        <div class="middle"
             @touchstart.prevent="middleTouchStart"
             @touchmove.prevent="middleTouchMove"
             @touchend="middleTouchEnd"
        >
          <div class="middle-l" ref="middleL">
            <div class="cd-wrapper" ref="cdWrapper">
              <div class="cd" :class="cdCls">
                <img class="image" :src="currentSong.image">
              </div>
            </div>
            <div class="playing-lyric-wrapper">
              <div class="playing-lyric">{{playingLyric}}</div>
            </div>
          </div>
					<!-- 歌词的界面 -->
          <scroll class="middle-r" ref="lyricList" :data="currentLyric && currentLyric.lines">
            <div class="lyric-wrapper">
              <div v-if="currentLyric">
                <p ref="lyricLine"
                   class="text"
                   :class="{'current': currentLineNum ===index}"
                   v-for="(line,index) in currentLyric.lines">{{line.txt}}</p>
              </div>
            </div>
          </scroll>
       
				</div>
      <div class="bottom">
          <div class="dot-wrapper">
            <span class="dot" :class="{'active':currentShow==='cd'}"></span>
            <span class="dot" :class="{'active':currentShow==='lyric'}"></span>
          </div>
          <div class="progress-wrapper">
            <span class="time time-l">{{format(currentTime)}}</span>
            <div class="progress-bar-wrapper">
							<!-- 音乐播发时间线条组件 -->
              <progress-bar :percent="percent" @percentChange="onProgressBarChange"></progress-bar>
            </div>
            <span class="time time-r">{{format(currentSong.duration)}}</span>
          </div>
          <div class="operators">
						<!-- @click="changeMode" -->
						<!-- 随机切换 i :class="iconMode" -->
            <div class="icon i-left" >
              <i  ></i>
            </div>
            <div class="icon i-left" :class="disableCls">
              <i @click="prev" class="icon-prev"></i>
            </div>
            <div class="icon i-center" :class="disableCls">
              <i @click="togglePlaying" :class="playIcon"></i>
            </div>
            <div class="icon i-right" :class="disableCls">
              <i @click="next" class="icon-next"></i>
            </div>
            <div class="icon i-right">
              <!-- :class="getFavoriteIcon(currentSong)" -->
              <i @click="toggleFavorite(currentSong)"    class="icon" ></i>
            </div>
          </div>
        </div>

			</div>
</transition>
		<!-- 底部迷里播放器 -->
    <transition name="mini">
      <div class="mini-player" v-show="!fullScreen" @click="open">
       <div class="icon">
          <img :class="cdCls" width="40" height="40" :src="currentSong.image">
        </div>
        <div class="text">
          <h2 class="name" v-html="currentSong.name"></h2>
          <p class="desc" v-html="currentSong.singer"></p>
        </div>
        <div class="control">
         <progress-circle :radius="radius" :percent="percent">
            <i @click.stop="togglePlaying" class="icon-mini" :class="miniIcon"></i>
          </progress-circle>
        </div>
        <div class="control" @click.stop="showPlaylist">
          <i class="icon-playlist"></i>
        </div>
      </div>
  
	
		</transition>
    <!-- <playlist ref="playlist"></playlist> -->
   <audio ref="audio" :src="currentSong.url" @play="ready" @error="error" @timeupdate="updateTime"
           @ended="end"></audio> 
  </div>
</template>

<script >
  import {mapGetters, mapMutations, mapActions} from 'vuex'
   import animations from 'create-keyframe-animation'
   import {prefixStyle} from 'common/js/dom'
   import ProgressBar from 'base/progress-bar/progress-bar'
   import ProgressCircle from 'base/progress-circle/progress-circle'
   import {playMode} from 'common/js/config'
   // import Lyric from 'lyric-parser' 没有请求链接
  import Scroll from 'base/scroll/scroll'
  import {playerMixin} from 'common/js/mixin'
  // import Playlist from 'components/playlist/playlist'

   const transform = prefixStyle('transform')
   const transitionDuration = prefixStyle('transitionDuration')

  export default {
    mixins: [playerMixin],
    data() {
      return {
        songReady: false,
        currentTime: 0,
        radius: 32,
        currentLyric: null,
        currentLineNum: 0,
        currentShow: 'cd',
        playingLyric: ''
      }
    },
    computed: {
      cdCls() {
        return this.playing ? 'play' : 'play pause'
      },
      playIcon() {
        return this.playing ? 'icon-pause' : 'icon-play'
      },
      miniIcon() {
        return this.playing ? 'icon-pause-mini' : 'icon-play-mini'
      },
      disableCls() { //播放禁止
        return this.songReady ? '' : 'disable'
      },
      percent() {
        return this.currentTime / this.currentSong.duration
      },
      ...mapGetters([
        'currentIndex',
        'fullScreen',
				'playlist',
        'playing',
				'currentSong',
				'mode'
      ])
    },
    created() {
      this.touch = {}
    },
    methods: {
      back() {
        console.log()
        this.setFullScreen(false)
      },
      open() {
        this.setFullScreen(true)
      },
      enter(el, done) {
        const {x, y, scale} = this._getPosAndScale()

        let animation = {
          0: {
            transform: `translate3d(${x}px,${y}px,0) scale(${scale})`
          },
          60: {
            transform: `translate3d(0,0,0) scale(1.1)`
          },
          100: {
            transform: `translate3d(0,0,0) scale(1)`
          }
        }

        animations.registerAnimation({//动画配置 
          name: 'move',
          animation,
          presets: {
            duration: 400,
            easing: 'linear'
          }
        })
         //动画引用
        animations.runAnimation(this.$refs.cdWrapper, 'move', done)
      },
      afterEnter() {
        animations.unregisterAnimation('move')
        this.$refs.cdWrapper.style.animation = ''
      },
      leave(el, done) {
        this.$refs.cdWrapper.style.transition = 'all 0.4s'
        const {x, y, scale} = this._getPosAndScale()
        this.$refs.cdWrapper.style[transform] = `translate3d(${x}px,${y}px,0) scale(${scale})`
        this.$refs.cdWrapper.addEventListener('transitionend', done)
      },
      afterLeave() {
        this.$refs.cdWrapper.style.transition = ''
        this.$refs.cdWrapper.style[transform] = ''
      },
      togglePlaying() {
        if (!this.songReady) {
          return
        }
        this.setPlayingState(!this.playing)
        if (this.currentLyric) {
          this.currentLyric.togglePlay()
        }
      },
      end() { //切换到下一首
        if (this.mode === playMode.loop) {
          this.loop()
        } else {
          this.next()
        }
      },
      loop() {//循环播发的功能
        this.$refs.audio.currentTime = 0
        this.$refs.audio.play()
        this.setPlayingState(true)
        if (this.currentLyric) {
          this.currentLyric.seek(0)
        }
      },
      next() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex + 1
          if (index === this.playlist.length) {
            index = 0
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      prev() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex - 1
          if (index === -1) {
            index = this.playlist.length - 1
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      ready() {
        this.songReady = true
        this.savePlayHistory(this.currentSong)
      },
      error() {
        this.songReady = true
      },
      updateTime(e) { //播放器音乐时间
        console.log(e)
        this.currentTime = e.target.currentTime
      },
      format(interval) { //秒的时间转化
        interval = interval | 0
        const minute = interval / 60 | 0
        const second = this._pad(interval % 60)
        return `${minute}:${second}`
      },
      onProgressBarChange(percent) {//实时更新小球时间
        const currentTime = this.currentSong.duration * percent
        this.$refs.audio.currentTime = currentTime
        if (!this.playing) {
          this.togglePlaying()
        }
        if (this.currentLyric) {
          this.currentLyric.seek(currentTime * 1000)
        }
      },
      getLyric() {
        this.currentSong.getLyric().then((lyric) => {
          if (this.currentSong.lyric !== lyric) {
            return
          }
          this.currentLyric = new Lyric(lyric, this.handleLyric)
          if (this.playing) {
            this.currentLyric.play()
          }
        }).catch(() => {
          this.currentLyric = null
          this.playingLyric = ''
          this.currentLineNum = 0
        })
      },
      handleLyric({lineNum, txt}) {
        this.currentLineNum = lineNum
        if (lineNum > 5) {
          let lineEl = this.$refs.lyricLine[lineNum - 5]
          this.$refs.lyricList.scrollToElement(lineEl, 1000)
        } else {
          this.$refs.lyricList.scrollTo(0, 0, 1000)
        }
        this.playingLyric = txt
      },
      showPlaylist() {
        this.$refs.playlist.show()
      },
      middleTouchStart(e) {
        this.touch.initiated = true
        // 用来判断是否是一次移动
        this.touch.moved = false
        const touch = e.touches[0]
        this.touch.startX = touch.pageX
        this.touch.startY = touch.pageY
      },
      middleTouchMove(e) {
        if (!this.touch.initiated) {
          return
        }
        const touch = e.touches[0]
        const deltaX = touch.pageX - this.touch.startX
        const deltaY = touch.pageY - this.touch.startY
        if (Math.abs(deltaY) > Math.abs(deltaX)) {
          return
        }
        if (!this.touch.moved) {
          this.touch.moved = true
        }
        const left = this.currentShow === 'cd' ? 0 : -window.innerWidth
        const offsetWidth = Math.min(0, Math.max(-window.innerWidth, left + deltaX))
        this.touch.percent = Math.abs(offsetWidth / window.innerWidth)
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = 0
        this.$refs.middleL.style.opacity = 1 - this.touch.percent
        this.$refs.middleL.style[transitionDuration] = 0
      },
      middleTouchEnd() {
        if (!this.touch.moved) {
          return
        }
        let offsetWidth
        let opacity
        if (this.currentShow === 'cd') {
          if (this.touch.percent > 0.1) {
            offsetWidth = -window.innerWidth
            opacity = 0
            this.currentShow = 'lyric'
          } else {
            offsetWidth = 0
            opacity = 1
          }
        } else {
          if (this.touch.percent < 0.9) {
            offsetWidth = 0
            this.currentShow = 'cd'
            opacity = 1
          } else {
            offsetWidth = -window.innerWidth
            opacity = 0
          }
        }
        const time = 300
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = `${time}ms`
        this.$refs.middleL.style.opacity = opacity
        this.$refs.middleL.style[transitionDuration] = `${time}ms`
        this.touch.initiated = false
      },
      _pad(num, n = 2) {//秒的扑0 00：59
        let len = num.toString().length
        while (len < n) {
          num = '0' + num
          len++
        }
        return num
      },
      _getPosAndScale() {
        const targetWidth = 40
        const paddingLeft = 40
        const paddingBottom = 30
        const paddingTop = 80
        const width = window.innerWidth * 0.8
        const scale = targetWidth / width
        const x = -(window.innerWidth / 2 - paddingLeft)
        const y = window.innerHeight - paddingTop - width / 2 - paddingBottom
        return {
          x,
          y,
          scale
        }
      },
      ...mapMutations({
        setFullScreen: 'SET_FULL_SCREEN',
        setPlayingState:'SET_PLAYING_STATE'
      }),
      ...mapActions([
        'savePlayHistory'
      ])
    },
    watch: {
      currentSong(newSong, oldSong) {
        if (!newSong.id) {
          return
        }
        if (newSong.id === oldSong.id) {
          return
        }
        if (this.currentLyric) {
          this.currentLyric.stop()
          this.currentTime = 0
          this.playingLyric = ''
          this.currentLineNum = 0
        }
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.$refs.audio.play()
          this.getLyric()
        }, 1000)
      },
      playing(newPlaying) {
        const audio = this.$refs.audio
        this.$nextTick(() => {
          newPlaying ? audio.play() : audio.pause()
        })
      },
      fullScreen(newVal) {
        if (newVal) {
          setTimeout(() => {
            this.$refs.lyricList.refresh()
          }, 20)
        }
      }
    },
   
		
		components: {
      ProgressBar,
      ProgressCircle,
      Scroll,
      // Playlist
    }
  }
</script>

<style lang="less"  scoped>
	   @import '../../common/stylus/variable.less';

  .player{
    .normal-player{
      position: fixed;
      left: 0;
      right: 0;
      top: 0;
      bottom: 0;
      z-index: 150;
      background: @color-background;
      .background{
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        opacity: 0.6;
        filter: blur(20px);
			}
      .top{
        position: relative;
        margin-bottom: 25px;
        .back{
          position:absolute;
          top: 0;
          left: 6px;
          z-index: 50;
          .icon-back{
            display: block;
            padding: 9px;
            font-size: @font-size-large-x;
            color: @color-theme;
            transform: rotate(-90deg);
						}
				  }
        .title{
          width: 70%;
          margin: 0 auto;
          line-height: 40px;
          text-align: center;
          text-overflow: ellipsis;
          overflow: hidden;
          white-space: nowrap;
          font-size: @font-size-large;
          color: @color-text;
					}
        .subtitle{
          line-height: 20px;
          text-align: center;
          font-size: @font-size-medium;
          color: @color-text;
				 }
					
				}
					
					
					
      .middle{
        position: fixed;
        width: 100%;
        top: 80px;
        bottom: 170px;
        white-space: nowrap;
        font-size: 0;
        .middle-l{
          display: inline-block;
          vertical-align: top;
          position: relative;
          width: 100%;
          height: 0;
          padding-top: 80%;
          .cd-wrapper{
            position: absolute;
            left: 10%;
            top: 0;
            width: 80%;
            height: 100%;
            .cd{
              width: 100%;
              height: 100%;
              box-sizing: border-box;
              border: 10px solid rgba(255, 255, 255, 0.1);
              border-radius: 50%;
              &.play{
                animation: rotate 20s linear infinite;
								}
              &.pause{
                animation-play-state: paused;
								}
              .image{
                position: absolute;
                left: 0;
                top: 0;
                width: 100%;
                height: 100%;
                border-radius: 50%;
							   }
							  }
							 }
							}

          .playing-lyric-wrapper{
            width: 80%;
            margin: 30px auto 0 auto;
            overflow: hidden;
            text-align: center;
            .playing-lyric{
              height: 20px;
              line-height: 20px;
              font-size: @font-size-medium;
              color: @color-text-l;
							}
					}
        .middle-r{
          display: inline-block;
          vertical-align: top;
          width: 100%;
          height: 100%;
          overflow: hidden;
          .lyric-wrapper{
            width: 80%;
            margin: 0 auto;
            overflow: hidden;
            text-align: center;
            .text{
              line-height: 32px;
              color:@color-text-l;
              font-size: @font-size-medium;
              &.current{color:@color-text;}
						  }
							
						}
				}
      
			}
			
			
			
			.bottom{
        position: absolute;
        bottom: 50px;
        width: 100%;
        .dot-wrapper{
          text-align: center;
          font-size: 0;
          .dot{
            display: inline-block;
            vertical-align: middle;
            margin: 0 4px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: @color-text-l;
            &.active{
              width: 20px;
              border-radius: 5px;
              background: @color-text-ll;
						}
					}
				}
        .progress-wrapper{
          display: flex;
          align-items: center;
          width: 80%;
          margin: 0px auto;
          padding: 10px 0;
          .time{
            color: @color-text;
            font-size: @font-size-small;
            flex: 0 0 30px;
            line-height: 30px;
            width: 30px;
            &.time-l{
              text-align: left;
						}
            &.time-r{
              text-align: right;
						}
					}
          .progress-bar-wrapper{
            flex: 1;
					}
				 }
        .operators{
          display: flex;
          align-items: center;
          .icon{
            flex: 1;
            color:@color-theme;
            &.disable{
              color: @color-theme-d;
						}
            i{
              font-size: 30px;
						}	
					}
          .i-left{
            text-align: right;
					}
          .i-center{
            padding: 0 20px;
            text-align: center;
            i{
              font-size: 40px;
						}
					}
          .i-right{
            text-align: left;
					}
          .icon-favorite{
            color: @color-sub-theme;
					}
				}
      &.normal-enter-active, &.normal-leave-active{
        transition: all 0.4s;
        .top, .bottom{
          transition: all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32);
					}
      }
			
			&.normal-enter, &.normal-leave-to{
        opacity: 0;
        .top{
          transform: translate3d(0, -100px, 0);
				}
        .bottom{
          transform: translate3d(0, 100px, 0);
			}
     }
		
	
 }
 }
		
		
		
		
		
		
		.mini-player{
      display: flex;
      align-items: center;
      position: fixed;
      left: 0;
      bottom: 0;
      z-index: 180;
      width: 100%;
      height: 60px;
      background: @color-highlight-background;
      &.mini-enter-active, &.mini-leave-active{
        transition: all 0.4s;
			}
      &.mini-enter, &.mini-leave-to{
        opacity: 0;
			}
      .icon{
        flex: 0 0 40px;
        width: 40px;
        padding: 0 10px 0 20px;
        img{
          border-radius: 50%;
          &.play{
            animation: rotate 10s linear infinite;
					}
          &.pause{
            animation-play-state: paused;
					}
				}
			}
      .text{
        display: flex;
        flex-direction: column;
        justify-content: center;
        flex: 1;
        line-height: 20px;
        overflow: hidden;
        .name{
          margin-bottom: 2px;
          text-overflow: ellipsis;
					overflow: hidden;
					white-space: nowrap;
          font-size: @font-size-medium;
          color: @color-text;
					}
        .desc{
          text-overflow: ellipsis;
          overflow: hidden;
          white-space: nowrap;
          font-size: @font-size-small;
          color: @color-text-d;
				}
			  }
      .control{
        flex: 0 0 30px;
        width: 30px;
        padding: 0 10px;
        .icon-play-mini, .icon-pause-mini, .icon-playlist{
          font-size: 30px;
          color: @color-theme-d;
					}
        .icon-mini{
          font-size: 32px;
          position: absolute;
          left: 0;
          top: 0;
				}
     }
  
}	
	
	@keyframes rotate{
    0%{
      transform: rotate(0);
		}
    100%{
      transform: rotate(360deg);
		}
}

}



</style>